公开(公告)号：DE3370212D1

公开(公告)日：1987-04-16

申请号：DE3370212

申请日：1983-09-20

Applicant: IBM

Inventor： DIX GARY LEE ,  HEIM LLOYD STEPHEN ,  HERALD ROBERT FREDERICK ,  QUINLAN WILLIAM PATRICK

IPC: G11B20/10 ,  G06F11/07 ,  G11B19/04 ,  G11B20/18 ,  G06F11/00 ,  G11B5/09

Abstract: Error information is passed across a limited interface (10) from a disk drive to its using system by making use of the read data line during a fault mode operation. Fault mode operation is detected by a pulse width detector (46) in an adapter between the using system and the disk drive. The pulse width detector detects the presence of a fault signal on the read data line and inhibits the passage of the spindle motor on (MTR ON) signal from the using system to the disk drive. The step signal (STEP) normally used to index the recording head is passed to the disk drive during fault mode operation. A microcomputer (30) at the disk drive detects the absence of the MTR ON signal and the presence of the step signal and outputs a fault data bit. Thereafter, the fault data word is gated onto the read data line at the rate of one bit per step so long as the MTR ON signal is absent.

公开(公告)号：FR2374724A1

公开(公告)日：1978-07-13

申请号：FR7733082

申请日：1977-10-24

Applicant: IBM

Inventor： DIX GARY LEE ,  HANSON CHARLES C ,  JAHNKE ROBIN C ,  KING FRANCIS K

IPC: G11B21/02 ,  G11B5/55 ,  G11B17/02 ,  G11B21/08

公开(公告)号：DE2756766A1

公开(公告)日：1978-06-29

申请号：DE2756766

申请日：1977-12-20

Applicant: IBM

Inventor： DIX GARY LEE ,  HANSON CHARLES CHRISTIAN ,  JAHNKE ROBIN CHARLES ,  KING FRANCIS KONG

IPC: G11B21/02 ,  G11B5/55 ,  G11B17/02 ,  G11B21/08 ,  G11B5/012 ,  G06F3/06